Chain 9/24/2024 03:38:00 No. 72175 [Open] [Reply] 848192 Actions report Translate Thread... Hide Thread Translate... Hide User Hide Post GYI3rfKacA... jpeg (209.92 KB, 801x1800) >>/72174/ 4-hydroxynonenal (4-HNE) is a highly reactive aldehyde formed when polyunsaturated fats (PUFAs), like those found in seed oils, are exposed to high heat during frying.